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  2. Sleep paralysis - Wikipedia

    en.wikipedia.org/wiki/Sleep_paralysis

    Between 8% and 50% of people experience sleep paralysis at some point during their lives. [2] [4] About 5% of people have regular episodes. Males and females are affected equally. [2] Sleep paralysis has been described throughout history. It is believed to have played a role in the creation of stories about alien abduction and other paranormal ...

  3. Narcolepsy - Wikipedia

    en.wikipedia.org/wiki/Narcolepsy

    The other symptoms may begin alone or in combination months or years after the onset of the daytime naps. There are wide variations in the development, severity, and order of appearance of cataplexy, sleep paralysis, and hypnagogic hallucinations in individuals. Only about 20 to 25 percent of people with narcolepsy experience all four symptoms.

  4. Parasomnia - Wikipedia

    en.wikipedia.org/wiki/Parasomnia

    Sleep paralysis is associated with sleep-related hallucinations. [22] Predisposing factors for the development of recurrent isolated sleep paralysis are sleep deprivation, an irregular sleep-wake cycle, e.g. caused by shift work, or stress. [22] A possible cause could be the prolongation of REM sleep muscle atonia upon awakening. [34]

  5. What causes sleep paralysis? The science behind the ... - AOL

    www.aol.com/news/causes-sleep-paralysis-science...

    Sleep paralysis occurs when your mind is awake, but your body can’t move, Xue Ming, a sleep expert and professor of neurology at the Rutgers New Jersey Medical School, tells me. You can ...

  6. Sleep paralysis symptoms and treatment - AOL

    www.aol.com/news/sleep-paralysis-what-symptoms...

    Ever been frightened by not being able to move or speak in the night? You're not alone.

  7. True Life: I Had a Sleep Paralysis Demon. Here’s What ... - AOL

    www.aol.com/lifestyle/true-life-had-sleep...

    As for that ominous shadow, Dr. Robbins says that hallucination often accompanies sleep paralysis, “some of which can be quite disturbing and take the form of scary figures, such as demons or ...

  8. Hypnopompia - Wikipedia

    en.wikipedia.org/wiki/Hypnopompia

    Its mirror is the hypnagogic state at sleep onset; though often conflated, the two states are not identical and have a different phenomenological character. Hypnopompic and hypnagogic hallucinations are frequently accompanied by sleep paralysis, which is a state wherein one is consciously aware of one's surroundings but unable to move or speak.

  9. Hypnagogia - Wikipedia

    en.wikipedia.org/wiki/Hypnagogia

    Hypnagogic hallucinations are often auditory or have an auditory component. Like the visuals, hypnagogic sounds vary in intensity from faint impressions to loud noises, like knocking and crashes and bangs (exploding head syndrome). People may imagine their own name called, crumpling bags, white noise, or a doorbell ringing.